[Shotimes] climate control stuck on high

[van Oss]

Dave,

I suspect your Blower Speed Control Module may be faulty.  When this module fails, it can exhibit a number of symptoms, the most
common of which is that the blower runs at full speed no matter what you set at the ETAC head unit.

When your system blows out of the defrost/panel/floor openings, that indicates the vacuum-operated dampers are working correctly
under the direction of the ETAC head.  The blend door is another matter.  When it fails, the blend door stays where it last was set.
In my case, that meant full heat.  The diagnosis for blend-door motor failure is an ETAC self-test.

John Vitamvas posted some text and photos on the SHO Forum about his work in repairing Blower Speed Control Modules.  I downloaded
that info and can pass it along if you wish.  If you can swap modules with a healthy SHO (well, any Taurus LX or Sable LS with
ETAC), that will help confirm the diagnosis.

Joseph van Oss



----- Original Message -----
Once again, the 93 ATX has gremlins. I wrote before that the climate control
would intermittently switch from blowing on auto temp (low speed) to full
speed. When I would turn it off, the defrost would blow super high---higher
than normal even---but the display still read 'OFF.'

Well, now it blows on high right at startup. Occasionally it will sputter,
but comes right back on.

...the fan starts blowing right away at startup. I have no apparent
fan control, but the blend door seems to be functioning properly, as I can
get it to blow (at high, of course) from where the display says it should.
Dave